Ideal box for a JL Audio 12W6v1?

I like the sound of my JL Audio box, but I was wondering whether it could go louder, and a bit lower. Would porting help in this instance? If so, what frequency should it be tuned to, and what size should the box be?

Currently I have two sealed enclosures. One is 1.34Cu Ft, the other being 1.76 CuFt (both measurements before sub displacement).

What would you guys recommend? Would it sound worse in a ported enclosure, and would it be wise for me to stick to the Sealed boxes, or should it sound fairly good?

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